Pressure-reducing valve.



No. 683,69L'5 Patented (lot. I, 190i. F. M. KRAMER.

PRESSURE REDUCING VALVE.

(Application filed Dec/21, 1900.)

2 Sheets-Sheet l.

(No Model.)

No. 683,691. Pat ented Oct. I901. F. m. KRAMER.

PRESSURE REDUCING VALVE.

(Application filed Dec. 21, 1900.) 4 (No Model.) 2Sheats-Sheot 2.

gr g I fowzm/im": Ziw/mfiw UNITED STATES PATENT OFFICE.

FRIEDRICH MAX KRAMER, OF LEIPSIC-ANGER, GERMANY.

PRESSURE-REDUCING VALVE.

SPECIFICATION forming part of Letters Patent No. 683,691, dated October 1, 1901.

Application filed December 21,1900. Serial No. 40,685. (No model.)

To all whom, it may concern.-

Be it known that I, FRIEDRICH MAX KRA- MER, a subject of the King of Saxony, residing at Leipsic-Anger, Germany, have invented certain new and useful Improvements in Pressure-Reducing Valves, of which the following is a full, clear, and exact description.

The present invention relates to pressurereducing valves; and it consists of the details of construction hereinafter set forth, and particularly pointed out in the claims.

In order to render the present specification easily intelligible, reference is had to the accompanying drawings, in which similar letters of reference denote similar parts throughout the several views.

Figures 1, 2, and 3 are vertical sections through the valve, showing the various members of the same in different positions, as hereinafter explained. Fig. 4 is a horizontal section on lineN N of Fig. 3, and Fig. 5 a similar section on line R R of Fig. 3.

The valve-housing comprises the passage 19 for the high-pressure fluid, and p for the reduced-pressure medium. Between these two passages the main-valve seatingis arranged, consisting of an interior cylinder 7% and an exterior lower ring h, mounted at the lower end of the cylinder h and connected concentrically to the same by means of a series of ribs, so as to leave the spaces '6 between the two rings, as will be clearly seen at Figs. ean'd 5. Thelower edges of the two concentric rings lie in one and the same plane or are so mounted that they will be both closed by the main valve The latter valve has a hollow upwardly-projecting stem provided with outwardly-extending lugs k which are overgripped by the downwardly-extending arms cl of a rod d", which is attached to a membrane m, mounted in the upper part of the housing, the said rod extending out of the housing and being coupled to the weighted lever 12, pivotall mounted on the exterior of the housing at b. In the valve 7a a small throughlet is provided to establish communication between the openings t' and the space below the main valve, and the edges of the latter are turned up to inclose the downwardly projecting edges of the outer ring it. Centrally arranged in the body of the valve it is a small valve (1, the stem of which projects upwardly through the hollow stem of the valve and is provided at the upper part with a spring f, which tends to close the valve to when the spindle d has been raised high enough to allow space above the valve-stem and between it and the part (1 for the springf to take effect, as will be obvious by comparison of Figs. 1 and 3. When it is out of action, the whole Valve may be positively closed by means of the hand-wheel and spindle 00 in the well-- known manner.

The device operates in the following manner: The pressure medium under full pressure coming along the passage 19 passes down through the openings 2' and pushes the valve 70 open, Fig. 2. It then passes up through the cylinder 7?. into the reduced-pressure space and to the passage 1). The pressure above the valve 70 raises the membrane on and the weight of lever 19 as soon as the said pressure exceeds the standard desired pressure to which the weight has been adjusted. If the membrane has raised the rod d far enough, the part (I of the same pulls the valve 7c up, closing the same against its seat. This movement of the parts allows the springf to operate to close the valve a also, so that the fullpressure fluid is thereby cut off. Full-pressure fluid can, however, still pass through the openings 2' and the small channel 3, as also through the space between 7' and 72, if this should not be quite tight, so that full pressure will be established below the valve 7c, which tends to keep the same closed. As soon as the pressure above it falls below the normal amount the weight of lever b lowers the rod d, thus first forcing down the stem of the small valve a and opening the same and then allowing the valve is to open until the membrane has been raised far enough to close the valves 70 and a, when the desired pressure will be established above the valve 70 and the latter will again be closed.

A piston might be substituted for the membrane m, as will be readily understood.

I claim as my invention- 1. In a pressure-reducing valve having a main valve adapted to be closed by the fullpressure fluid and controlled by a weighted lever and membrane, the combination of a series of openings in communication with the high-pressure space of the valve-housing, a

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small opening in the valve to establish communication between said openings and the space below the valve, and a valve within the main valve to control communication between the space below the latter and the reducedpressure space, said valve being opened by the 'weighted lever when the pressure falls below the normal reduced pressure, in the manner and for the purpose substantially as described.

2. In a pressure-reducing valve having a main valve closed by the full pressure, a weighted lever and a membrane to control said main valve, the combination of a cylindrical throughlet from the high-pressure to the reduced-pressure housing, and a concentric annular opening to establish communication from the high-pressure space to the space below the main valve, the main valve having an upwardly-turned rim to close over the downwardly-extending outer edge of the said coupled, and means for enabling the said rod to open the throughlet-valve of the main valve when the weighted lever falls in the manner and for the purpose substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

FRIEDRICH MAX KRAMER.

Witnesses:

HERM. SACK, RUDOLPH FRICKE. 

